Bug 1829870 (CVE-2019-20788)

Summary:	CVE-2019-20788 libvncserver: integer overflow and heap-based buffer overflow in libvncclient/cursor.c in HandleCursorShape function
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	jadahl, negativo17, rdieter, scorneli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in libvncserver in versions through 0.9.12. A large height or width value may cause an integer overflow or a heap-based buffer overflow. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-12 13:49:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1829871, 1829872
Bug Blocks:	1829873

Description Guilherme de Almeida Suckevicz 2020-04-30 13:55:28 UTC

libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.

Reference and upstream commit:
https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed

Comment 1 Guilherme de Almeida Suckevicz 2020-04-30 13:55:48 UTC

Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1829872]
Affects: fedora-all [bug 1829871]

Comment 2 Stefan Cornelius 2020-05-12 13:49:41 UTC


*** This bug has been marked as a duplicate of bug 1811948 ***

Comment 3 Doran Moppert 2020-06-17 03:17:50 UTC

Statement:

This flaw was found to be a duplicate of CVE-2019-15690. Please see https://access.redhat.com/security/cve/CVE-2019-15690 for information about affected products and security errata.